Image Upload and Download

[Former Member]

Hi All

I am working on Netweaver2004s

The scenario is like

I have a webdynpro application where in I need to Upload , Display the image in browser and then FTP the image to a server .

I have created a FileUpload type UI and bound it to binary type attribute say Datasource.

Now

<b>byte[] imgData = wdContext.currentContextElement().getDatasource();</b>

gives byte[] and this imgData I have been using in my FTP code.

1) Now please let me know since IWDModifiableBinaryType APIs has been replaced by <b>IWDResource</b> and <b>WDResourceFactory</b>, How can i proceed with getting the byte Array ?

2) I have an Image UI, I have been using <b>IWDCachedWebResource</b>, to convert the URLString to Image.

<b>IWDCachedWebResource res =

WDWebResource.getWebResource(

imgData,

WDWebResourceType.JPG_IMAGE);</b>

Now using <b>res.getAbsoluteURL(),</b> i am getting the string which i have bound to Image UI.

Now IWDCachedWebResource has also deprecated.

Can u pls help in my scenario, how can i replace IWDModifiableBinaryType and IWDCachedWebResource with IWDResource APIs.

Regards

Sonal Mangla

[Former Member]

Hi ,

For upload use this code:

InputStream text = null;

int temp = 0;

try

{

File file = new File(wdContext.currentContextElement().getFileResources().getResourceName());

FileOutputStream op = new FileOutputStream(file);

if(wdContext.currentContextElement().getFileResources()!=null)

{

text = wdContext.currentContextElement().getFileResources().read(false);

while((temp=text.read())!=-1)

{

op.write(temp);

}

}

op.flush();

op.close();

String path = file.getAbsolutePath();

wdComponentAPI.getMessageManager().reportSuccess("File has uploaded Sucessfully:\n"+path);

}

catch(Exception e)

{

e.printStackTrace();

}

For Download:

/*********************************For Downloading PDF**********************************************/

it should be in wdDoInit().

String fname = wdContext.currentEx_Project_Search_ResultsElement().getProjectid().toString();

String FILE_NAME =fname+ ".pdf";

WDWebResourceType FILE_EXT = WDWebResourceType.PDF;

try {

String resourcePath = "E:/usr/sap/CR5/DVEBMGS01/j2ee/cluster/server0/" + FILE_NAME;

//wdComponentAPI.getMessageManager().reportSuccess(resourcePath);

IWDResource resource = WDResourceFactory.createResource( new FileInputStream(new File(resourcePath)),FILE_NAME,FILE_EXT,true);

wdContext.currentContextElement().setFileResource(resource);

}

catch(Exception e)

{

e.printStackTrace();

}

<b></b><i></i><u></u>Place this code in end of the view implementation, it should be between begin and end statements:

private byte[] getByteArrayFromResourcePath(String resourcePath)

throws FileNotFoundException, IOException {

FileInputStream in = new FileInputStream(new File(resourcePath));

ByteArrayOutputStream out = new ByteArrayOutputStream();

int length;

byte[] part = new byte[10 * 1024];

while ((length = in.read(part)) != -1) {

out.write(part, 0, length);

}

in.close();

return out.toByteArray();

}

<b></b><b></b><b></b><i></i><b></b><b></b><i></i><u></u>

[former_member751941]

Hi Sonal,

Here is the code for byte array.

String resourcePath =

WDURLGenerator.getResourcePath(

wdComponentAPI.getDeployableObjectPart(),

FileDownloadView.FILE_NAME);

// retrieve byte array for given resource path and store it

// in context value attribute 'FileResource'

wdContext.currentContextElement().setFileResource(

this.getByteArrayFromResourcePath(resourcePath));

//--

---

return s byte array--

---

/**

• Returns a byte array for a given file resource path

*/

private byte[] getByteArrayFromResourcePath(String resourcePath)

throws FileNotFoundException, IOException {

FileInputStream in = new FileInputStream(new File(resourcePath));

ByteArrayOutputStream out = new ByteArrayOutputStream();

int length;

byte[] part = new byte[10 * 1024];

while ((length = in.read(part)) != -1) {

out.write(part, 0, length);

}

in.close();

return out.toByteArray();

}

//----

---

// store image file name in constant FILE_NAME

private static final String FILE_NAME = "sap.jpg";

<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/202a850a-58e0-2910-eeb3-bfc3e081257f">Uploading and Downloading Files in Web Dynpro Java</a>

<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/00062266-3aa9-2910-d485-f1088c3a4d71">Uploading and Downloading Images in Web Dynpro Java</a>

Regards,

Mithu

[Former Member]

Hi Mangla,

For downloading use this

Create a context attribute and set calculated as true then u will get a getter method,In that u write code like this

IWDInputStream stream = null;

try {

stream = WDResourceFactory.createInputStream(new FileInputStream(new File(<give the location of a file u want to download>));

}

catch (Exception e)

{

e.printStackTrace();

}

return stream;

for open file u set "resource"as Resource type context attribute

[Former Member]

Hi,

The files are storing in a server not in "src/mimes/Components/<package>".

Could you reply on how to download a file stored in server.

I think WDResourceFactory, IWDInputStream are working for the files stored in

"src/mimes/Components/<package>".

Thanks,

sreeni

[Former Member]

Hi Sathish

Thanks for the effort. I gor the Stream, But how can i convert it to byte array.

Either we have to create InputStream

<b>InputStream imgDataInp =

wdContext.currentContextElement().getDatasource().read(true);

byte[] imgData = new byte[imgDataInp.available()];</b>

But its not working

and what is to be done 2nd point mentioned

Regards

Sonal Mangla

[oliver]

Hi Sonal,

as you are working on NW70, you should check out Bertram Ganz' Weblogs about FileUpload and FileDownload in WebDynpro where he explains hot to use the WDResource classes in detail.

/people/bertram.ganz/blog/2007/05/25/new-web-dynpro-java-tutorials--uploading-and-downloading-files-in-sap-netweaver-70

Here is the corresponding tutorial

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/00062266-3aa9-2910-d485-f1088c3a...

and sample project:

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/30398c47-40a9-2910-4aae-cec9b96d...

Regarding the image: I usually place them in the project under "src/mimes/Components/<package>".

Next create a value attribute and put the filename of the image in there. That one you have to use as a "source" attribute in your ImageUI. That should work.

Best regards,

ok

Message was edited by:

Oliver Kohl

[Former Member]

Hi Mangla,

For uploading use this code

try{

String Upload=wdContext.currentContextElement().getResource().getResourceName();

FileOutputStream fout=new FileOutputStream(new File(upload));

}

catch(Exception e)

{

e.getStackTrace();

}